react-eats.js

getCartQuantity = () => {
    this.getTotalPrice();
    const updatedCart = [...this.state.cart];
    let quant = [];
    updatedCart.forEach(element => {
      quant.push(element.quantity);
    });
    quant = quant.reduce((accumulator, currentValue) => accumulator + currentValue, 0);
    this.setState({ totalQuantity: quant });
  };